Typewriting machine



Sept. 7 1926.

A. G. F. KUROWSKi TYPEWRITING MACHINE Filed August 13. 1923 Patented Sept. 7, 1926.

UNITEDTSTATES.

PATENT; OFFICE. ,i

- ALFRED G. F.- KUEOWS KI, OF BRCOKLYN, NEW' YORK, ASSIGN'OR" TO UNDERWOOD TYPEWRITEB COMPANY,1OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPEWRITIN G MACHINE.

I Application fi1ed August 13, 1923. SerialNo. 657,050.

The invention relates to manifolding, typewriting machine, platen-bars of the general class shown in 'Letters Patent to P, E. Pierce, No. 1,149,855, dated August 10, 1915; that is to say, to bars-of harder,or less resilient, material thanthe surface of the platen, and which may be set to the platen longitudinally thereof at' the printing ]ine, in fixed position on the'machine, when axha-rd backing surface for clear typing, 1 through a manifold comprising many superposed sheets,- is desired. More particularly, the invention relates to means for attaching such a bar to the machine.

A featureof' the invention is. the provision of means whereby, without the trouble and loss of time involved in the set ting and unsetting ofscrews, pins, andthe like, a manifolding bar of the, character inentioned nay be attached to and disconnected from the machine. i

Another feature of the invention is the provision of means. whereby the bar, in being set upon the machine, is automatically guided to true position thereon-with respect to the platen, and there held against'lateral displacement. further feature of the in- ,vention is the provision of means whereby the bar, in being seated in its correctlposition, is automatically locked in such position. Another feature. of the invention is the provision ofmeans; for locking'the bar to the side plates, of the platen-carriage, .such that, afterthe operator has taken-the proper holdon the bar to lift the same from the machine, he may unlock the same byfa simplemovement ofthe fingers; the operations of unlocking and removing the. bar being thus reduced to substantially a single I operation.

Other features and matter appear. I

In the accompanying drawings,

Figurel is a front View of the platen and platen-frame of a typewriting" machine equipped with rnechanism embodying, the

present invention. I

Figure 2 is a view, in side elevation,of

the apparatus shown inFigure 1. I,

Figure 3 a top plan view ofv the righthand portion of the apparatus, shown in v Figures 1 and 2.

bymeans of its axlell, isv revolubly mounted inthe sideplatesil2 of .the platen-carriag'e, v On the; ends of the A platen 10,

' therearound.

adya-ntages will here 1 V of the latch-plate is beveled as at 31 to form a knife edge adapted, when the plate is platen-axle are the usual hand-wheels 13 v for rotating the same. Suitable mechanism '(not shown) 'co-operates with a ratchetwheel 14:, fast'tov the left-hand end of the platen-axle, for .elfecting line-spaceirotary movement of the platen. Type-bars 15 strike against the front of theplatenl Set tothe platen longitudinally thereof, at the printing line, is a manifolding bar 16. The ends of this bar are secured by screws 17 to depending arms 18 forming part of brackets19. ,Detents 20 maybe struck out of the arms 18 into holes 21 in the ends of the bar 16 to prevent angular displacement of the bar on the screw 17; The bar and the brackets thus form a-unitary structure. The brackets comprise flat, horizontallydisposed,plates or portions 22 adapted to beset upon and be supported by horizontal flanges 23 on the side plates 12 of the carriage. Set into, and projectingupward from, each of the flanges 23 is a pin. or' post 24, preferably in the form of a, screw having an-enlarged conical head .25.-

Each of the plates 22 is apertured at 26 to be passed over the corresponding post-head 25. A washer 27 on each post 24 lies withinplate 22 when the plate is in place on the between the top face of thewasher and the under face or shoulder formed by the postwhich is adapted to bear against the base of the headof each post 24 and fit closely Formedfon thefront edge of each bracket-plate22 is an ear 28, on which is pivoted, at 29, a latch inthe formwof a late laid flat upon thebracket-plate 22. nc edge The latches are spring latches adapted to be thrown automatically into. bracketlocking position as the brackets come to rest in home position on theside plates of the carriage. 1n placlngthe manlfoldlng; bar

the aperture 26 flush with the top of the upon the *lIlL'Chl'IlGi For this purpose, each a latch 30 has, as part thereof, an arm 32 which projects forward, and which, at -its" flange 23 ';'thus'providing anannular groove 3 claim forward end, is turned down in front of the bracket-plate 22 to form a depending finger 33. A similar finger or ear 34, integral with the bracket-plate 22, depends from the rear edge of the latter behind the latch-finger 33. A coil-spring 35 is secured at one end to the finger 33 and at its other end to the finger 34, thus tending to throw the latch around its pivot 29 in bracket-locking direction. For determining the locked and unlocked positions of the latch 30, the latter has therein a slot 36 curved on an arc struck from the pivot 29 as a center. Passed through the slot 36, and set into the bracket, is a headed pin 37. Engagement of the pin 37 with one end of the slot 36 determines the locking position of the latch, and engagement of thepin 37 with the other end of the slot 36 determines the position to which the latch may be thrown to unlock the bracket. l/Vhen, therefore, the brackets are off the machine, the latches can be thrown but partially across the apertures 26 in the brackets. Thus, in positioning the brackets over the posts 24, the conical heads 25 of the latter act as cams to force the latches back against the action of the springs 35 to permit the latches to clear the heads of the posts; whereupon the springs act, aforesaid, to throw the latches under the post-heads.

-be moved against the action of its spring 35 to unlock the brackets. Each bracket is also preferably provided with a finger-piece 39, by means of which the brackets, as a unit with the bar 16, may be lifted from the carriage.

'The bar is shown as slightly bowed from end to end in order that, when the brackets are set upon the carriage, the bar will assume a uniform bearing and close aligning contact with the platen throughout its entire length. The bar is shown also as curved transversely to the curvature of the platen so as snugly to embrace the same throughout the width thereof.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I

1. In a typewriting machine having a rotary platen, a carriage in which the platen is journaled, a manifolding bar set to the platen longitudinally thereof at the printing line and a bracket carried by each end of the bar, a securing mechanism for removably securing the brackets to the carriage, including pins carried at the opposite'sides of the carriage, the brackets having apertures for receptionof the pins, spring latches for automatically locking'the brackets to the pins as the same are positioned thereon, and guides engaging the pins, whereby to properly locate said bar relatively to the platen and for rigidly holding, said bar in position when brought to latched relation with the pins.

2. In a typewriting machine having a rotary platen, a carriage in which the platen is journaled, a manifolding bar set to the platen longitudinally thereof at the printing line, and a bracket carried'by each end of the bar, a securing mechanism for removably securing the brackets to the carriage,

including pins carried upon the opposite 3. In a typewriting machine having a rotary platen, a carriage in which theplaten is journaled, a inanifolding bar-set to the platen longitudinally thereof at the printing line and a bracket carried by each end of the bar, a securing mechanism for removably securing the brackets to the carriage,

including pins on the sides of the carriage arranged to pass through apertures. in the brackets as the latter are'positioned, latches on the brackets arranged to be movedv into interlocking engagement with the pins, and

halfcircular collars, engaging around the pins adjacent the opposite side of each latch,

the pins conforming to the curvature of the collars, whereby the bar is held against displacement when in latched position on the carriage.

4c. In a typewriting machme" havmg a is journaied, a manifolding bar set to the platen longitudinally thereof at the printing line and a bracket carried by eachend of the bar, a securing mechanism for removably securing the brackets to the carriage, including pins on the sides of-the carriage having tapered heads arranged to pass bar is held against lateral and longitudinal displacement on the carriage.

5. In a typewriting machine having a rotary platen, a carriage in which the platen .tained therein by the latches, whereby the I rotary platen, a carriage in which the platen the bar, a securing mechanism for remov-r ably securing the brackets to the carriage, including upstanding pins on opposite sides of the carriage arranged to pass throughapertures in the brackets as the latter are positioned, latches pivoted on the brackets V to swing laterally toward or away from the pins, springs connected at one end to the latches and at the other end to the brackets for throwing the latches into interlocking engagement with the pins, half-circular guides on the opposite side of each latch, the pins conforming to the'guides and holding the bar against lateral and longitudinal dis placement, and finger-pieces carried by the l latches, the fingeiapieces being operable to disengage the latches from the pins against the action of the springs and then being utilized for lifting the bar clear of the pins,

' 6; In a typewriting machine having a rotary platen, a carriagein which the platen is journaled, a manifolding bar set to the platen longitudinally thereof at the printing line and a bracket at each end of the I bar, a securing mechanism for removably securing the brackets to the carriage, comprising pins on the one arranged to pass through 1 1 apertures in the otheruas the brackets are positioned, and pivoted latches on the apertured elements arranged to be moved into interlocking engagement with the pins. 7 ALFRED F. KUROWSKI. 

